"U know life is great when u wake up at 9 am DRUNK!!!!! #London #happybirthdayTYTY #G4L #H0Navy," Rihanna tweeted Sunday morning, later writing, "You know it was a good night when u wake up n run to your BFF's room like...How did I get in my bed? Did I walk? Stumble? Get carried?"

After the 24-year-old "Where Have You Been" crooner rocked out at Kanye and Jay-Z's concert that night, they all went on to party at a birthday bash for manager Tyran Smith, according to the Daily Mail, where Rihanna mingled with the likes of Kim Kardashian, Rob Kardashian and his girlfriend Rita Ora.

And it must've been one heck of a party because Rihanna not only missed her flight home the next day...she also slept through a session with her choreographer.

"So ummm.... I'm supposed to be on a plane rt now!," the singer went on.

Luckily, it appeared Jay-Z gave her some time to sleep the whole thing off.

"JayZ saved me!!!!! I got an extra day off sorry @HiHatprod," Rihanna tweeted to her choreographer. "CMONNNN Rih! Get here so we can kill this rehearsal!,"her choreographer tweeted back to her.

And while we're not sure how much time Rihanna's going to give herself before she heads back to the party scene this time (she was just spotted partying at the Roxbury club in Hollywood a few nights ago), it looks like she's giving hard-core clubbing a rest...at least for a day...we think.

"You will be very disappointed to know last night was my final hurrah til my vacation! I ain't about this life," Rihanna tweeted, wrapping up her rant of the evening's shenanigans.